Temperature Effect on Dislocation Slip Mechanism of Nanotwinned Mg with Void Defect at the Twin Boundary

5th Annual International Conference on Material Engineering and Application

工业技术（总论）;材料科学

Huang, Kaixin^1 ; Yao, Junping^1 ; Hu, Qiyao^1 ; Shao, Letian^1 ; Sun, Zhong^1

School of Aeronautical Manufacture Engineering, Nanchang Hangkong University, Nanchang

330063, China^1

关键词: Dislocation slip;    Lattice misfits;    Molecular dynamics modeling;    Nanotwinned;    Shockley partial dislocations;    Twin boundaries;    Uniaxial tensile loading;    Void defects;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/484/1/012018/pdf
DOI  :  10.1088/1757-899X/484/1/012018

来源: IOP

【 摘 要 】

In this paper, a molecular dynamics model is used to simulate the uniaxial tensile loading process at different temperatures of nano-twinned Mg with void defect at the twin boundaries. The dislocation slip mechanism during the stage of plastic deformation for different temperatures was studied. The results show that the initial edge dislocations formed from lattice misfit. It is found that the propagations of the slip bands emitted and the stacking faults also generated from Shockley partial dislocation.